36VHigh-performance, High-reliability Withstand …

Datasheet

36VHigh-performance,

High-reliability Withstand Voltage

Stepping Motor Driver

BD68715EFV

¡ñGeneral Description

BD68715EFV is a bipolar low-consumption driver that

driven by PWM current. Rated power supply voltage of

the device is 36 V, and rated output current is 1.5 A.

PARA-IN driving mode is adopted for input interface,

and excitation mode is corresponding to FULL STEP

mode, HALF STEP mode (2 types) and QUARTER

STEP mode via a built-in DAC. In terms of current

decay, the FAST DECAY/SLOW DECAY ratio may be

set without any limitation, and all available modes may

be controlled in the most appropriate way. In addition,

the power supply may be driven by one single system,

which simplifies the design.

¡ñ Features

¡ö

Rated output current£¨DC£©1.5A

¡ö

Low ON resistance DMOS output

¡ö

PARA-IN drive mode

¡ö

PWM constant current (other oscillation)

¡ö

Built-in spike noise cancel function (external noise

filter is unnecessary)

¡ö

Full-, half (two kinds)-, quarter-step functionality

¡ö

Freely timing excitation mode switch

¡ö

Current decay mode switch

£¨linearly variable FAST/SLOW DECAY ratio£©

¡ö

Normal rotation & reverse rotation switching

function

¡ö

Power save function

¡ö

Built-in logic input pull-down resistor

¡ö

Power-on reset function

¡ö

Thermal shutdown circuit (TSD)

¡ö

Over-current protection circuit£¨OCP£©

¡ö

Under voltage lock out circuit (UVLO)

¡ö

Over voltage lock out circuit (OVLO)

¡ö

Ghost Supply Prevention (protects against

malfunction when power supply is disconnected)

¡ö

Adjacent pins short protection

¡ö

Microminiature, ultra-thin and high heat-radiation

(exposed metal type) package

¡ñ Key Specifications

¡ö Range of power supply voltage

19¡«28 [V]

¡ö Rated output current (continuous)

1.5 [A]

¡ö

Rated output current (peak value)

2.0 [A]

¡ö

Range of operating temperature

-25¡«+85 [¡æ]

¡ö

Output ON resistance (total of

0.95 [¦¸] (Typ.)

upper and lower resistors)

¡ñPackage

W(Typ.) x D(Typ.)x H(Max.)

HTSSOP-B28

9.70mm x 6.40mm x 1.00mm

¡ñ Typical Application circuit

9 GND

PHASE1 15

PHASE2 17

14 PS

I01 16

I11 18

I02 19

I12 20

VREF 13

7 VCC1

5

2

3

4

¡ñ Applications

¡ö

PPC, multi-function printer, laser beam printer, and

ink-jet printer

¡ö

Monitoring camera and WEB camera

¡ö

Sewing machine

¡ö

Photo printer, FAX, scanner and mini printer

¡ö

Toy and robot

22

CR 10

24

27

26

MTH 12

25

1

OUT1A

OUT1B

RNF1

RNF1S

VCC2

OUT2A

OUT2B

RNF2

RNF2S

GND

Figure.1 Application circuit

¡ð Product structure£ºsilicon monolithic integrated circuit



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BD68715EFV

¡ñ Pin Configuration

¡ñ Block Diagram

[TOP VIEW]

28

NC

OUT1B

2

27

OUT2B

RNF1

3

26

RNF2

RNF1S

4

25

RNF2S

OUT1A

NC

VCC1

NC

GND

5

24

OUT2A

6

23

NC

21

8

9

VREF 13

OCP

OVLO

UVLO

RESET

9 GND

14 PS

£«

£­

2bit DAC

7 VCC1

5

£«

RNF1S

£­

2

3

£«

RNF2S

£­

Blank time

PWM control

NC

20

Translator

TSD

I12 20

VCC2

22

7

PHASE1 15

PHASE2 17

I01 16

I11 18

I02 19

CR 10

I12

22

24

OSC

27

19

CR 10

NC 11

18

I02

MTH 12

MTH 12

17

PHASE2

VREF 13

16

I01

PS 14

15

PHASE1

26

Mix decay

control

I11

OUT1A

OUT1B

RNF1

4 RNF1S

Predriver

1

Control logic

GND

25

Regulator

1

VCC2

OUT2A

OUT2B

RNF2

RNF2S

GND

Figure.3 Block Diagram

Figure.2 Pin configuration

¡ñ Pin Description

Pin No.

Pin name

1

GND

2

OUT1B

3

RNF1

4

Function

Pin No.

Pin name

Function

Ground terminal

15

PHASE1

H bridge output terminal

16

I01

Connection terminal of resistor for

output current detection

17

PHASE2

RNF1S

Input

terminal

comparator

18

I11

VREF division ratio setting terminal

5

OUT1A

H bridge output terminal

19

I02

VREF division ratio setting terminal

6

NC

Non connection

20

I12

VREF division ratio setting terminal

7

VCC1

Power supply terminal

21

NC

Non connection

8

NC

Non connection

22

VCC2

9

GND

Ground terminal

23

NC

10

CR

Connection terminal of CR for setting

chopping frequency

24

OUT2A

H bridge output terminal

11

NC

Non connection

25

RNF2S

Input terminal of current limit comparator

12

MTH

Current decay mode setting terminal

26

RNF2

Connection terminal of resistor for output

current detection

13

VREF

Output current value setting terminal

27

OUT2B

14

PS

Power save terminal

28

NC



? 2016 ROHM Co., Ltd. All rights reserved.

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of

current

limit

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Phase selection terminal

VREF division ratio setting terminal

Phase selection terminal

Power supply terminal

Non connection

H bridge output terminal

Non connection

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BD68715EFV

¡ñ Absolute Maximum Ratings (Ta=25¡æ)

Item

Symbol

Rated Value

Unit

VCC1,2

-0.2¡«+36.0

V

VIN

-0.2¡«+5.5

V

RNF maximum voltage

VRNF

0.7

V

Maximum output current (DC)

IOUT

1.5

A/Phase

IOUTPEAK

2.0

A/Phase

Operating temperature range

Topr

-25¡«+85

¡æ

Storage temperature range

Tstg

-55¡«+150

¡æ

Supply voltage

Input voltage for control pin

Maximum

output

(PEAK)(Note 1)

current

(Note 1)Pulse width tw¨Q1ms, duty 20%.

Caution: Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit between

pins and the internal circuitry. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is operated over the absolute

maximum ratings.

¡ñRecommended operating range (Ta= -25¡«+85¡æ)

Item

Supply voltage

Maximum Output current (DC)



? 2016 ROHM Co., Ltd. All rights reserved.

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Symbol

Rated Value

Unit

VCC1,2

19¡«28

V

IOUT

1.2

A/ Phase

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BD68715EFV

Thermal Resistance(Note 2)

Parameter

Symbol

Thermal Resistance (Typ)

Unit

1s(Note 4)

2s2p(Note 5)

¦ÈJA

107.0

25.1

¡ãC/W

¦·JT

6

3

¡ãC/W

HTSSOP-B28

Junction to Ambient

Junction to Top Characterization Parameter

(Note 3)

(Note 2)Based on JESD51-2A(Still-Air)

(Note 3)The thermal characterization parameter to report the difference between junction temperature and the temperature at the top center of the outside

surface of the component package.

(Note 4)Using a PCB board based on JESD51-3.

Layer Number of

Measurement Board

Single

Material

Board Size

FR-4

114.3mm x 76.2mm x 1.57mmt

Top

Copper Pattern

Thickness

Footprints and Traces

70¦Ìm

(Note 5)Using a PCB board based on JESD51-7.

Layer Number of

Measurement Board

4 Layers

Material

Board Size

FR-4

114.3mm x 76.2mm x 1.6mmt

Top

2 Internal Layers

Bottom

Copper Pattern

Thickness

Copper Pattern

Thickness

Copper Pattern

Thickness

Footprints and Traces

70¦Ìm

74.2mm x 74.2mm

35¦Ìm

74.2mm x 74.2mm

70¦Ìm



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BD68715EFV

¡ñElectrical Characteristics (Unless otherwise specified Ta=25¡æ, VCC1,2=24V)

Specification

Item

Symbol

Minimum Standard Maximum

Unit

Condition

[Whole]

Circuit current at standby

ICCST

-

0.8

2.0

mA

PS=L

ICC

-

2.0

5.0

mA

PS=H, VREF=3V

H-level input voltage

VIN1H

2.8

-

-

V

L-level input voltage

VIN1L

-

-

0.6

V

VIN1HYS

-

0.85

-

V

H-level input current

IIN1H

35

50

100

?A

VIN1=5V

L-level input current

IIN1L

-10

0

-

?A

VIN1=0V

Circuit current

[Control input] (PHASE1, PHASE2)

Input hysteresis voltage

[Control input] (PS, I01, I11, I02, I12)

H-level input voltage

VIN2H

2.0

-

-

V

L-level input voltage

VIN2L

-

-

0.8

V

H-level input current

IIN2H

35

50

100

?A

VIN2=5V

L-level input current

IIN2L

-10

0

-

?A

VIN2=0V

IOUT =¡À1.0A (total of upper and

lower resistors)

[Output (OUT1A, OUT1B, OUT2A, OUT2B)]

Output ON resistance

RON

-

0.95

1.25

¦¸

Output leak current

ILEAK

-

-

10

?A

RNFXS input current

IRNFS

-2.0

-0.1

-

?A

RNFxS=0V

RNFX input current

IRNF

-80

-40

-

?A

RNFx=0V

VREF input current

IVREF

-2.0

-0.1

-

?A

VREF=0V

VREF input voltage range

VVREF

0

-

3.0

V

MTH input current

IMTH

-2.0

-0.1

-

?A

MTH input voltage range

VMTH

0

-

3.5

V

Minimum ON time

(Blank time)

tONMIN

0.3

0.7

1.5

?s

C=1000pF, R=39k¦¸

Comparator threshold

VCTH

0.57

0.60

0.63

V

VREF=3V

[Current control]



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